Interesting. So let's say the societal norm was for you to have relationships with members of the same sex, and you could never marry someone of the opposite sex. Would you:
1. Knuckle under, swallow your revulsion, and go into therapy to learn to love the right brand of gender, OR
2. Quietly live your true self in the shadows, loving likewise inclined members of the opposite sex, in fear of being exposed, OR
3. Live openly as a heterosexual, opening yourself up for ridicule, taunts, insults, and discrimination in hiring and elsewhere.
How do you like those choices? Could YOU change the gender you find attractive?
Do you not identify yourself as a heterosexual?
Your original point was that sexual preference was chosen, unlike being black.
My counterpoint was that being gay is hardwired at a very deep level, and invited you to consider how hardwired it is by imagining that you had to force yourself to love the same gender in order to comply with societal standards of right and wrong.
I'm sorry if it was too much to ask you to go through that thought-exercise. Or would be easy for you to be attracted to the same sex? Either way, if you don't want to respond, I understand.